carbon nanotubes were synthesized over a series of zn-containing fe/alumina catalysts by chemical vapor deposition method at two reaction temperatures of 850 and 950 °c using methane as a carbon source. catalysts were synthesized by keeping fe concentration constant and varying zn concentration to study the effects of zn. the catalysts were characterized using x – ray powder diffraction and n2 ...

A mild, green and highly efficient route for regio-selective amination of oxiranes was developed via incorporation of Mn(II), Fe(II), Co(II), Ni(II), Cu(II) and Zn(II) cations onto the surface of hydroxyapatite-encapsulated γ-Fe2O3 nanoparticles (γ-Fe2O3@HAp). Among six magnetically recoverable catalytic systems denoted as [γ-Fe2O3@HAp-MII], the catalyst in which M designated as Fe(II) showed t...

The recent advances in the photorefraction of doped lithium niobate crystals are reviewed. Materials have always been the main obstacle for commercial applications of photorefractive holographic storage. Though iron-doped LiNbO3 is the mainstay of holographic data storage efforts, several shortcomings, especially the low response speed, impede it from becoming a commercial recording medium. Thi...

Front cover image: Pyrolytic non-noble Fe-Nx-C ORR catalysts have shown great application potential in recent years. Understanding the active sites and nature of mass transportation is key to properly design a high-performance catalyst. In article number 10.1002/cey2.136, Chengyong Shu co-workers report novel Fe-N4-C catalyst with single atomic catalytic sites. The monodispersed porous structur...

We carried out the carbon nanotubes (CNTs) growth from an Au catalyst with two different kinds of chemical vapor deposition (CVD) methods. In case of thermal CVD (TCVD), high quality single-walled carbon nanotubes (SWNTs) can be grown. On the other hand, only poorly crystallized CNTs are synthesized with plasma CVD (PCVD). Through the parametric investigations, it is found that the hydrogen gas...

Fischer-Tropsch Synthesis (FTS) using Fe-Co/meso-HZSM-5 catalyst has been investigated. The impregnated iron and cobalt on HZSM-5 could be used as bifunction which combined polimerizing synthesis gas long hydrocarbon cracking for making biofuel (saturated C5–C25 hydrocarbons gasoline, kerosene diesel oil). study emphasized the effect of weight product composition process conversion. HZSM-5, had...

A stable Fe(4-TMPyP)-DNA-PADDA (FePyDP) film was characterized on pyrolytic graphite electrode (PGE) or an indium-tin oxide (ITO) electrode through the supramolecular interaction between water-soluble iron porphyrin (Fe(4-TMPyP)) and DNA template, where PADDA (poly(acrylamide-co-diallyldimethylammonium chloride) is employed as a co-immobilizing polymer. Cyclic voltammetry of FePyDP film showed ...

kinetic monte carlo simulation was applied to investigation of kinetics and mechanism of oxalic acid degradation by direct and heterogeneous catalytic ozonation. la-containing perovskites including lafeo3, lanio3, lacoo3 and lamno3 was studied as catalyst for oxalic acid ozonation. the reaction kinetic mechanisms of each abovementioned catalytic systems has been achieved. the rate constants val...

Base metal promoted gold/titania catalysts were synthesized, characterized and tested in CO oxidation reaction. Catalysts containing dopant metals in higher oxidation states exhibited higher activity than catalysts containing dopants in reduced states. The activity of fresh catalysts promoted by Cu, Fe and Ni was similar to the unpromoted one, but treatment in reducing and oxidizing atmospheres...

Abstract In this present study, a novel method to fabricate bimetallic Fe-Co catalyst supported on waste silica was investigated for the photo-Fenton-like (PFL) degradation of Methylene Blue (MB) dye. The uniqueness work is preparation via fluidized-bed crystallization (FBC) process. Under optimum conditions initial pH 3.0, 3.0 mM H 2 O , and 1.0 g L -1 FBC-derived Fe-Co/SiO (fFCS), maximum res...